DE60301204T2 - Lid made of cardboard for containers or trays for food - Google Patents

Abstract

A covering element for food containers comprises a main body (2) of paper material having a substantially convex shape and set, under operating conditions, to hold and cover foodstuffs, as well as hooking means (20) associated with the main body (2) and set to enable a steady engagement of the covering element with a tray for food. <IMAGE>

Description

The present invention has as subject a lid made of cardboard, according to the generic term of claim 1, in particular for container or bowls for Food.

As The most common is the packaging of biscuits of small size pursued practice the positioning of a given number of such products (which are generally rather small in size, such that they can be comfortably held on the palm) a shell in front; it is then provided wrapping in a thin paper wrapper, the outside is decorated. In this way a packaging of biscuits is obtained, at the weight of the pastries even held by the shell, while the shell and the biscuits enveloping paper wrapper as protection and cover against possible atmospheric external influences as well also as aesthetic Element serves.

Around the paper envelope of course, can also give a certain structural cohesion one or more support ribs used, which are generally made of thin cardboard, above the shell are arranged such that a corresponding "framework" (consisting of one or several bows, extending between two opposite sides of the shell itself) is determined. This framework serves as a support for the decorative paper and prevents the bottom surface of the same comes into contact with the food underneath.

Around after all to give the packaging thus obtained the necessary stability Very often is the attachment of a band-shaped element around the package provided so as to prevent the decorative paper Partially separate from the shell, except that to further improve the aesthetic Effect of packaging by knots and / or meshes of various Form is provided.

Of the summarized above explained state however, the art has some limitations.

In front Everything is indeed to notice how the preparation of such a package itself as long and complex proves: it is practically essential that To bring cover paper underneath the shell after it has been filled assign the possible stiffening ribs to the shell before with the full Wrapping it is started by the decorative paper, after all, as stated, is typically necessary several times and in different directions the band-shaped element around the package to wrap around. All these operations noticeably increase the time that necessary to make the package with the required features of stability and aesthetic To please, by the way not negligible Risks are borne by the baked goods (especially if the user the packaging is not particularly practiced in such manipulations).

What not negligible is the structural as well as aesthetic quality of the packaging connected with the user's own skill.

Also if there are no valid alternatives in the specific area, in any case, what is described above is a second solution of the State of the art.

In In this second case, the problem encountered relates to Packaging of food " the oven ", such as Tarts or pizzas (or generally products that typically Have dimensions that are larger as that of the palm); the for Such product types produced packaging can be used for transportation or for the temporary exhibition can be used on counters that for sale are determined.

in the In general, such packages have the assignment to an element, which serves as a tray, a cover element made of plastic, the often transparent, expedient way profiled so that a prismatic container is formed, within which the product is stored and in any case for the persons is kept in sight.

Such Deck elements are therefore made in one piece, and are expediently injection molded from plastic, such as polycarbonate and the like; unlike the packaging of pastries, looks typical use such objects not the presence of decorative elements, but limited on separation from the environment of food; it should be emphasized that the outer appearance the packaging made according to this known technique is extremely different is one of those typical pastry packages as well as the typical dimensions, as well as what the mechanical and / or aesthetic Properties are concerned.

The assignment of such monolithic cover elements to the trays significantly reduces the complexity of the operations necessary to package the food and gives the package itself higher mechanical capabilities (such that, for example, a certain number of Packages can be stacked without damaging their contents).

Such However, devices are subject to some contraindications, in particular from the point of view of economy and aesthetics Appearance.

Such Cover elements are under the aesthetic Point of view with pastries little appreciated (and indeed find the larger use at the big one Distribution of food that is sold in large quantities); moreover the purchase price of such items is greater than the packaging in Cardboard.

The execution in plastic also leads to further problems with the disposal of the packaging after the need for clear reasons biodegradability are connected.

Finally is emphasize that, according to the aesthetics different from typical biscuit packaging, the use of transparent plastic covers never could be used in pastry shops or at least in shops, which are intended for the retail sale of food.

From the document US 2246695 Also, a covering element for pies, sweets and similar foods is known for the protection of the food from contamination, which at the same time make it visible. The cover is formed by a sheet of flexible material and has a central, flat section from and a lateral, circular wall, which is fixed to the central portion and preferably has a frusto-conical shape. Near its lower edge, the lateral wall is provided with an annular ridge facing outwards, and receives the edge of the plate so that it is held in position by the elasticity of the shape within which the rim received in the groove holds the bridge.

The document US 4583680 describes a carrier for food such as hamburger. The container rim is an inverted cup made of cardboard; the lower edge of the container rim carries fixed tongues which are resiliently and releasably secured in slots in a vertical edge of the plate.

The document NL 8301218 describes a cardboard cover according to the preamble of claim 1 and comprises a main body having a surface and the lateral surface. The surface and the lateral surface cooperate to form a receiving space of substantially convex configuration to cover the food.

The lateral surface has a free edge that limits the receiving space and defines an opening, under conditions of use in the area of the lower part of the Cover element is arranged.

The Dutch Document also describes a free edge that is able to snap-in at a corresponding, upper edge of a container to be inserted.

Of the free edge of the main body, which limits the receiving space can have different shapes, below which is a substantially rectangular shape.

In this situation is the basis of the present invention technical problem to provide a cover, in particular for containers or Bowls for Food that is capable of substantially the said To remove borders.

in the Field of technical problem is an important objective of the invention the creation of a lid that is essentially capable of the same aesthetic Appearance of a conventional pastry package but at the same time it is a considerable simplification the execution and assembling method.

One Another important object of the invention is to provide a lid, the without special precautions to already existing trays can be adjusted, with a very fast and stable connection and a high degree of protection of the internal content becomes.

The The present invention is also the technical goal of creation a lid that is a noticeable Savings on material allows and in a special way allows, in a tangible way, the consumption of decorating paper, even if for the eye of the consumer a constant aesthetic Appearance is maintained.

One Another technical goal of the present invention is then the Creation of a cover that is used several times by the user and then be disposed of as garbage, once your own Function exhausted was, with no special problems, those with non-biodegradability connected to the material in which it is carried out.

Finally, one of the present inventions The underlying technical object is achieved in that a cover is obtained, which can be carried out with extremely simplified industrial procedures, overall for the benefit of economy in the production and ultimately the purchase price.

The specified technical task and the specified objectives are by achieved a lid, reproduced in one or more of the appended claims Features.

Now For example, and not by way of limitation, the description of preferred, but not exclusive embodiments a lid according to the invention reproduced in the attached Drawings is shown in which:

1a . 1b and 1c in a diagram and in a partially sectioned diagram a lid in accordance with the invention;

1d the corresponding food bowl according to the present invention;

2 schematically shows an embodiment of the lid according to the present invention;

2a and 2 B in plan view, the settlement in a plane of the lid, from 2 , according to two possible embodiments;

3 a view in section of the lid 1a , coupled to the shell 1d , represents;

3a in enlarged view a detail 3 shows;

4 a view in section of the lid according to the section line IV-IV 2 represents;

5 a view in section of the lid according to the section line VV 2 represents.

With reference to said figures, the cover according to the invention is indicated generally by the reference numeral 1 specified.

In accordance with the present invention, the lid comprises 1 essentially a main body 2 which is executed in cardboard. Such a main body 2 has an upper wall 2 B and a side wall 2a on top of that from the top wall 2 B protrudes.

The overall geometry of the main body is such that the lateral surface 2a and the upper surface 2 B for interaction, a recording room 2c establish.

Such a recording room 2c has a substantially convex shape so that objects can also be accommodated at a height which is greater than that of the shell, which accommodates them without danger of overlapping. In other words, the recording room 2c provided under working conditions to contain food by covering it.

Clearly, the side wall points 2a a free edge 3 up, down the reception room 2d limited; It should be noted that in practice, this free edge defines a bottom opening (under conditions of use of the lid 1 ) through which the biscuits or, more generally, the foodstuffs are "brought through" during packaging (to cover them).

At this point it should be noted that the main body 2 has no bottom wall or any other element (from the functional point of view) that completely closes said opening; This is essentially necessary because of the lid 1 is used in practice as a lid of a food packaging or tray which it is itself intended to form the bottom of the package and which will be more fully described hereinafter in the present specification.

In the preferred embodiment according to 1a For the determination of the lid certain main body is carried out starting from a flat sheet of a suitably punched cardboard, laying down the top wall 2 B and the side wall 2a is deep-drawn.

At the same time, it is provided for the lateral wall 2a to roll over in such a way that they into the in the 1a . 1b and 1c shown configuration is brought. In other words, it is also possible to train out 1a . 1b and 1c establish by starting from a single cardboard foil (without incisions or the like), which is suitably deep-drawn and bent.

In alternative embodiments 2 . 2a and 2 B For example, the main body intended to define the lid is executed by starting from a flat cardboard sheet which is punched to be as in the example 2a or 2 B shows, ready to suitably bent over and in position up to the in 2 explained configuration to be fixed.

In particular, show up in 2a or 2 B the cuts 30 , which are arranged in the region of the end sections, which are intended to the transition sections 3c of the lid.

Under assembly conditions are in particular the lateral areas 31 the transitional sections 3c destined to the corresponding lateral areas 32 the tabs to be overlapped, laying down the side surface 2a are determined.

It is also worth noting that laying down the side surfaces 2a certain sections have a predetermined number of fold lines 33 to under stiffening conditions of the lid, a stiffening of the side surfaces 2a itself, as well as other surfaces for engagement between the latter and the transition sections 3c to determine.

In particular, considering the 4 to notice how the side surfaces 2a are actually formed of two successive layers which are folded such that a double wall is fixed.

Clearly, such a configuration (alternative to that of the example of FIG 1a . 1b . 1c . 3 and 3c ) in the region of the angular regions of the lid, the transition sections 3c to clamp so effectively that they are between the outermost wall and the innermost wall of the lateral surface 2a are engaged.

Advantageously, the main body 2 deformable such that it can be processed advantageously and subsequently handled, but in particular it must have such a deformability that it can not be assimilated even if not "confused" with a real confectionery packaging.

The inner deformability of the main body 2 In any case, it is maintained at such a level that two opposite sections of the lateral wall 2a can be removed from each other by a length which is at least equal to 15% of their effective distance (or the distance they are located when no mechanical load is applied there) without cracks or permanent deformation in the main body 2 to cause itself.

It should be noted that such an indication of deformability is due to a proper choice of material and geometric relationships of the main body 2 is obtained; it is clear that should circumstances require, it is possible to alter such design parameters such that greater or lesser ductility than that stated is obtained.

The free edge 3 has a substantially rectangular shape. In particular, it should be noted that in 1a . 2 and 6 two first pages 3a and two second pages 3b are present, which are mutually parallel and mutually remote. To give a more pleasing aesthetic appearance, but to perform a product that is free of sharp edges (for the benefit of safety in handling and the resistance of cracking), the sides are 3a and 3b through transition sections 3c interrupted with a seconded course each.

To protect the food from excessive exposure to outside light and at the same time to offer a fair aesthetic appearance to the finished product is the main body 3 executed in a non-transparent material; moreover, the main body 2 formed to have an exterior view indicative of a confectionery package or packaging.

Referring to the construction details, it is noticeable how typically the first pages 3a have a length not exceeding 500 millimeters; parallel show the second pages 3b a length not exceeding 350 mm.

Typical values of the length of the first pages 3a namely, the following may be: 385, 362, 330, 297, about 245 or 198 millimeters; At the same time, the typical length values of the second pages 3b equal to 295, 267, 230, 215, 197, 170 or 139 millimeters.

Always with regard to the design parameters, the first main embodiment according to the present invention provides that for the main body 2 , executed in cardboard, a paper with a basis weight between 250 and 1050 grams per square meter is used; Advantageously, paper having a basis weight between 300 grams per square meter and 800 grams per square meter is used so as to give it a ductility comparable to that of a hand-wrapped package.

According to the present invention and as can be seen from the figures, the upper wall 2 B Transition sections 2d on. These transitional sections 2d connect material according to the top wall 2 B with the side wall 2a and have a given order of radii of curvature, which is changed continuously or intermittently (depending on the needs of the project).

Advantageously, these transition sections 2d curved so that it has the concavity of the side wall 2a in the direction of the recording room 2c is directed.

To find the best compromise between the feasibility of the transitional sections 2d and to obtain a pleasant aesthetic appearance, have the transitional sections 2d even a minimum radius of curvature above 7 millimeters ( 3 ) on.

In this regard, it should be noted that the order of the radii of curvature according to the present invention is also determined to obtain a suitable abutment area over which the lid 1 is then assigned to a tray container, according to the modalities described below.

In detail, the main body 2 a stop surface 4 on, which is essentially flat and in the direction of the free edge 3 directed limited opening; it is clear that this stop surface 4 within the recording room 2c is fixed (see 3 . 3a . 4 . 5 ).

Always to give the finished product an aesthetic appearance that is fully assimilable to that of a conventional hand-wrapped package, the main body has 2 a dimensional relationship between its own vertical dimension and the corresponding horizontal dimension that does not have a maximum above 0.25.

The lid according to the invention also with hook means 20 which are associated with the main body and are capable of allowing a removable engagement on a food bowl as explained in more detail below. In the representations of the 1a - 1c , include the hook means 20 at least a section of the lower edge 3 , of rolls 30 is wrapped so that a snap-like engagement with the food bowl is allowed.

Preferred, but not exclusive, this may roll 30 extend along the inner circumference of the lid. It should also be noted that this roller 30 by direct bending of the lateral wall 2a is fixed.

The hook means 20 alternatively comprise a predetermined number of tongues 21 which are provided to allow the snap-action engagement with the food bowl.

They can be integral with the main body 2 be executed ( 2 B ) or separately from the same and therefore subsequently engaged on the latter ( 2a ).

Such, the second embodiment of the hook means performing tongues 21 are defined by, for example, rectangular elements made in cardboard and attached by being attached to the main body 2 be attached. In particular, it is possible these tongues 21 to bend or engage in such a way that the same from the surface 2a within the recording room 2c protrude. The same tongues 21 , which show up in the form of lamellar elements, can be found both at the transitional sections 3c (preferred embodiment) as well as on the side surfaces 2a be set.

In accordance with the attached drawings 2 . 2a . 2 B . 4 and 5 illustrated embodiment and with particular reference to in 5 shown section, it can be noticed that the tongues in the area of each of the transition sections 3c can be assigned (or folded) and a first, on the side surface 2a in the area of the free edge 3 fixed end 21a and a second, free end 21b have, under the release position of the lid of the shell, at least partially from the surface of the transition section 3c is spaced.

Returning to the configuration of the lid, it is then possible to also provide a gripping member (not shown) corresponding to the main body 2 is assignable so that the transport of the packaging is allowed in a very convenient way.

For example, this gripping element can be fixed by a conventional linen band which is attached in the region of a central, upper part of the main body itself (in the region of, for example, the part 2 B out 1a ).

The method of performing a lid 2 in accordance with the example 2 is advantageously composed of the following main steps. To carry out the lid 1 to 4 it is proposed to have a first, flat sheet of cardboard, preferably of cardboard with the appropriate grammage, and about punching a PRE-bene number of cuts 30 in the area of transitional sections 3c perform.

At this point, the film or sheet is folded upon itself assuming a concave configuration, at which the transition sections 3c inside of which is brought by the cover of the specified cavity, in partial overlap of the corresponding, adjacent, lateral surfaces.

In particular, the lateral areas will 31 and 32 each of the transition sections and the surfaces 3c and the side surfaces 2a superimposed by creating contact surfaces that are used for mutual attachment.

Once after the side areas 31 at the corresponding, lateral areas 32 The body assumes a bulging, three-dimensional development. At this point it is possible to see the side surface 2a defining sections along predetermined fold lines 33 turn over. In this way one obtains a configuration of the lateral surface 2a in the way of the average 4 represented, ie with the free edge 3 defining area, which consists of a double wall. This allows, above all, to stiffen the structure of the lid and also in the area of the transition sections 3c set, with more contact surfaces with such sections allow a more effective and more resistant fastening movement.

It will also be another step in providing the hook means 20 ie the tongues 21 provided in the first embodiment ( 2 B ), or, in the second embodiment, in a detachable manner in the region of its first end 21a , preferably at the transition sections 3c are assigned (the same are dashed in 2 ) Shown.

The far end 21b The tongues are positioned in such a way that they are separated from the section 3c protrudes to under engaging conditions with the edge 10 a bowl (see 3 ) to overlap.

The present invention also provides the entire package for food (which is a particularly advantageous use in the packaging of confectionery products such as sweets, biscuits, pretzel sticks and the like); such a package essentially comprises a shell 9 which is positioned at the bottom and substantially intended to receive a plurality of foods (in short, serving as a support plane for the latter) and a lid 1 with one or more of the above features and provided to the top of the shell 9 to be deferred yourself.

In the details regarding this food container, it can be seen that the side wall 2a of the lid 2 and the corresponding peripheral wall 9a the Bowl 9 are profiled against each other; the stop surface 4 or 8th (the lid 2 belonging) is destined to be with a marginal strip 10 in touch. to be brought to the peripheral edge 9a the Bowl 9 belongs. Essentially, the food container described so far is out of the shell 9 and the lid 1 assembled, which are mutually arranged so that they are fixed to the container, which has an appearance which is virtually identical to that of a hand-packaged confectionery package.

The user who wants to pack a variety of confectionery products does not have to put them on the tray 2 position, according to which (unlike what happens in a conventional case) it will only be necessary on the shell 9 position the lid by placing the two components over the hook means described above 20 to each other.

In particular, the process is extremely simple and reliable; the lid will be above the bowl 9 positioned, to which it is profiled against and is therefore postponed to the same until the stop surfaces 4 or 8th the corresponding counter profiled edge 10 touch the shell. During the coupling step, the rolls become 30 or alternatively the tongues 21 (and in particular the second end or the free end 21b ) elastically against the transition section 3c through the edge 10 pushed until the moment where the edge 10 strikes against the corresponding edge of the lid, the tongue or the roller of the everted edge portion 10 freed, where she or it elastically in the transition section 3c spaced position returns and in the in 3 . 3a or 4 represented position, where she or it with the edge 10 overlaps.

in addition You can also use the tape strips or with laces or Ribbons provided with bows be provided, even if these latter are generally considered as accessories be and exclusively are bound to the final appearance of the product; in this manner and way receives Advantageously, a container of the same appearance a conventional one Package has, but much faster and with fewer problems, practical nature has been produced.

When reviewing a particular embodiment of the shell 9 It should be noted how these are mainly a substantially flat bottom wall 9b and a peripheral wall 9a possesses, which is connected with this latter. The bottom wall 9b and the peripheral wall 9a create a cavity in mutual cooperation 9c solid, intended to contain a variety of foodstuffs; it stands to reason that this cavity 9c , which has an upwardly directed into the normal use position of the container opening, helps, together with the through the lid 1 circumscribed recording room 2c to set the internal volume of the food container according to the invention.

Especially The bowl is provided to a predetermined number of biscuits, pastries or in any case products of limited dimensions compared to the Execution in the plan of the container to include yourself.

According to a particularly effective embodiment from the point of view of the structure and moreover have a considerable, aesthetic claim, in the region of each of the transition bends, a plurality of stiffening ribs are provided, which in the prevailing unwinding direction, the bottom wall 9b transverse, has an arcuate shape, the concavity of the peripheral wall 9a along the straight side corresponds.

In an original way, the peripheral wall includes 9a a border strip 10 which is turned outwards and arranged such that for at least a portion, but preferably completely, defines the contour of the opening, which imaginarily defines the lateral wall 9a sets. The edge strip 10 is such that a base section 11 is limited, which has a concave surface, which is practically the peripheral wall 9a listened to yourself (see 1d . 3 or 4 and 5 ). In other words, the edge strip 10 an arcuate development with convex curvature, the continuation of the concave curvature of the base portion 11 the peripheral wall 9a is arranged.

Advantageously, the edge strip wraps 10 so off, that your own edge 12 , which corresponds to the cutting line of the fin material, is arranged on one side; in accordance with the present teachings is this edge 12 directed substantially down to the position of normal use of the container such that any contact of the food with the shell part 9 which is not covered by the film for food.

The arcuate development with convex curvature of the marginal strip 10 therefore extends in extension of the concave curvature of the base portion 11 at a fair angle to the edge 12 to align down. In practice, since the tangent is at the turning point between the concavity of the base section 11 and the convexity of the marginal strip 10 usually opposite the level of the bottom wall 9b forms a win angle of about 60 °, this extension angle of the convexity of the soil strip 10 not below about 120 °.

As just appreciated, therefore, are the vertical perpendicular to the bottom wall 9b going plane and the tangent to the edge in the edge point 12 form an angle equal to or greater than 120 °.

In practice, it is the presence of such a geometry of the shell rim that a snap-like engagement of the lid on the shell itself (see 3 ) allowed.

Another original feature of the shell 9 where the above-mentioned arcuate ribs are present (in the area of transitional arches 9d ), lies in the formation of the ribs themselves.

These ribs, instead of being formed by arcuate webs as in the prior art, ie by constricted convex portions which are stepped by further concave portions (or at most identical ones) are always through the part of the shell 9 fixed cavity defined by adjacent, convex portions such that between them complementary incisions are formed, which in turn are formed substantially edged.

In practice, outside appear through the shell 9 fixed cavity corresponding to the convexities and the edged, just described incisions complementary convexes substantially the inner surfaces (ie, in the direction of the cavity) of the corresponding transition areas that are present in the shells of the prior art.

With In other words, the radii of curvature The convex portions decidedly larger than those that concave Corresponding sections and therefore show the stiffening ribs in the area of the upper, folded edge more extensive and individually bulged while the convex portions are lower in the development and in some places on their surface almost edgy.

In any case, it is necessary to clarify the fact that the main surfaces which interact mechanically with one another essentially consist of the abutment section 4 . 8th and from the rolls 30 or from the tongues 21 of the lid 1 and through the edge strip 10 consist; thanks to their special training you get namely an extremely stable coupling of the lid 1 with the shell 9 , In other words, thanks to the coupling of the marginal strip 10 and the stopper section 8th become possible, relative displacements between the shell 9 and the lid 1 along substantially horizontal directions (or generally longitudinal directions parallel to the plane in which the bottom wall 9b is) prevented; the rolls 30 (or the tongues 21 ) and the edge 10 prevent vertical displacements while removing the two parts; in this way, completing a package, using the components described herein, is much more convenient and secure, as only the attachment between shell 9 and lid 1 along the vertical direction over a convenient shape of the hooking section and the rollers 30 (the tongues 21 ) must be ensured.

The Invention achieves important advantages.

The Namely, the constructive architecture of the present invention allows the public to offer an object that possesses an aesthetics that is essentially with that of the conventional confectionery packages coincides and that at the same time it can be handled without the difficulties in the execution found the "conventional" packages become. It should be noted that such features are all to the advantage of practical nature, even on the part of non-expert Staff or around a large amount within short times of packages.

One Another advantage of the lid according to the present Invention is given by the fact that it saves a considerable amount on paper while the use allowed since decoration paper can be saved that according to the known Practice in surplus must be used to make the foldable layers of the package set and / or be guided below the bottom of the tray.

It to add that also needs to be considered that the total used material to provide a complete package essentially moderate is and from the moment where the entire packaging is made of cardboard, considerable advantages from the point of disposal of the used Packages are available.

It is finally to underline that such a cover the manufacturing cost minimizes and simplifies the manufacturing process considerably given that no particularly complex forms are executed have to and that the preparatory work of the lid itself is few and have no particular technical difficulties.

moreover allows the stackability of the various covers a beneficial Storage and transportation of the same.

Claims (18)

Lid made of cardboard, in particular for containers or bowls for foodstuffs, comprising: a cardboard main body having a top surface ( 2 B ) and a side surface ( 2a ) extending from the upper surface ( 2 B ), wherein the lateral surface ( 2a ) and the upper surface ( 2 B ) together a receiving space ( 2c ), in a substantially convex configuration, which is provided to receive and cover food under working conditions, the lateral area ( 2a ) a free edge ( 3 ) having the receiving space ( 2c ) and defines an opening under working conditions below the lid ( 1 ), wherein the free, the receiving space ( 2c ) bordering a substantially rectangular profile with first and second, opposite sides ( 3a . 3b ), each through transitional sections ( 3c ) are graded; - hook means ( 20 ) associated with the main body and capable of allowing a removable engagement with a food bowl, the hook means ( 20 ) on the side surface ( 2a ) of the main body are engaged, - wherein the hook means ( 20 ) preferably at least in the region of the transition sections ( 3c ), characterized in that the upper surface ( 2 B ) Transitional sections ( 2d ), which physically covers the upper surface ( 2 B ) to the side surface ( 2a ) and have a predetermined sequence of radii of curvature. Lid according to claim 1, characterized in that the hook means ( 20 ) a predetermined number of rolls ( 30 ) and / or tongues ( 21 ) to allow a snap-on engagement with the food bowl. Lid according to claim 2, characterized in that the tongues a first on the side surface ( 2a ) fixed end ( 21a ) and a second, free end ( 21b ), which are intended, upon engagement of the shell with the edge ( 10 ) of the shell itself, the tongues preferably being made of cardboard, and more preferably being defined by leaf-shaped elements attached to the main body ( 2 ) or are stuck to these latter and folded. Lid according to claim 1, characterized in that the main body ( 2 ) is deformable such that opposite portions of the lateral surface ( 2a ) are removable from each other by a length equal to 15% of their effective distance, without cracks or permanent deformation in the main body ( 2 ) to cause. Lid according to claim 1, characterized in that the main body ( 2 ) has one gram between 250 and 1050 grams per square meter, and preferably in an interval between 300 grams per square meter and 800 grams per square meter. Lid according to claim 1, characterized in that the main body ( 2 ) a substantially flat stop surface ( 4 ), which is directed towards the opening, wherein the abutment surface ( 4 ) within the recording room ( 2 ). Lid according to claim 2, characterized in that the rolls ( 30 ) through arcuate sections of the lateral surface ( 2a ) are defined and extend for example in the region of the entire, lower circumference of the lid. Method for producing a cover ( 1 ), in particular for containers or bowls for food, in accordance with any one of the preceding claims, characterized in that it comprises the following steps: - providing a first, flat sheet of cardboard; - pulling this flat sheet until it has a three-dimensional, concave formation with an upper surface ( 2 B ) and a lateral, from the upper surface ( 2 B ) protruding surface ( 2a ), which together form a recording room ( 2c ) define a substantially convex shape with a lower opening in use of the lid, wherein the lateral surface ( 2a ) a free, the recording room ( 2c ) has a limiting edge and a substantially rectangular design with first and second opposite sides ( 3a . 3b ), each through transition sections ( 3c ), the upper surface ( 2 B ) Transitional sections ( 2d ), which physically covers the upper surface ( 2 B ) with the lateral surface ( 2a ) and have a predetermined order of radii of curvature; - provision of hook means ( 20 ), the transitional sections ( 3c ) and / or the lateral surface ( 2a ) to allow stable engagement with a food tray or container. Method according to the preceding claim, characterized in that the step of providing hook means ( 20 ) comprises the following substeps: - executing a predetermined number of tongues ( 21 ); - assigning a first end ( 21a ) of the tongues to the transitional periods ( 3c ) and / or the lateral surface ( 2 B ); - release a second end ( 21b ) of the tongues to allow them, with the use of the shell, with a rim ( 10 ) of the shell itself to overlap. A method according to claim 8, characterized in that the step of providing the hook means ( 20 ) a rolling-up step of the lateral surface ( 2a ) around the interior of the receiving space ( 2c ) for fixing at least one roller ( 30 ). A method according to claim 8, characterized in that it further comprises the step of folding over on itself the lateral surface ( 2 ) defining a free edge ( 3 ) with double wall and possibly the contact surface in transitional sections ( 3c ) and the lateral surface ( 2a ) increase. Packaging for foodstuffs, in particular for confectionery products, such as confectionery, biscuits, tarts, pretzel sticks and the like, comprising: - a tray intended for holding a plurality of foodstuffs ( 9 ), characterized in that it also has a lid ( 1 ), which is provided on the bowl-like container ( 9 ), the lid being of the type according to any one of the preceding claims from 1 to 7. Packaging according to claim 12, characterized in that the lateral surface ( 2a ) of the lid ( 2 ) and a circumferential wall ( 9a ) the Bowl ( 9 ) are profiled against each other. Packaging according to claim 13, characterized in that the shell ( 9 ) comprises: - a substantially flat bottom wall ( 9b ) and a peripheral wall ( 9a ), which has a cavity ( 9c ) having an opening which is directed upwards in the position of normal use of the container itself, the peripheral wall ( 9a ) preferably has a substantially concave inner surface which is directed towards the cavity, wherein the peripheral wall ( 9a ) a border strip ( 10 ), which is turned outwards, and is arranged in the region of at least a portion of the contour of the opening, wherein the edge strip ( 10 ) a base section ( 11 ), which has the substantially concave surface. Packaging according to claim 14, characterized in that the edge strip ( 10 ) has an arcuate development with a convex curvature following the concave curvature of the base portion ( 11 ) of the peripheral wall ( 9a ) is arranged. Packaging according to claim 14, characterized in that the shell ( 9 ) consists of a sheet-like material and that the edge strip ( 10 ) extends in such a way that it has an edge at the end ( 12 ) corresponding to the cutting line of the sheet material and substantially in the position of normal use of the container directed downwards. Packaging according to claim 15, characterized in that the edge strip ( 10 ) has an arcuate development with a convex curvature which, according to an angle, does not extend below 120 ° with respect to the bottom wall ( 9b ) runs parallel plane. Packaging according to claim 14, including a shell ( 9 ) designed to contain a large number of foodstuffs, of the substantially rectangular type, with transitional arches at the corners ( 9d ) between rectilinear sides and a substantially flat bottom wall ( 9b ) and a peripheral wall ( 9a ) comprising a cavity ( 9c ) having an opening which is directed upwards in the position of normal use of the container itself, the peripheral wall ( 9a ) one to the cavity ( 9c ), having a substantially concave inner surface, and in the region of each of the transition arcs ( 9d ) a plurality of stiffening ribs ( 10 ), which in the direction of the preferred, substantially to the bottom wall ( 9b ) of the transverse development, have an arc-shaped configuration, which leads to the concavity of the peripheral wall ( 9a ) along the rectilinear sides, characterized in that the stiffening ribs ( 10 ) by the concavity ( 9c ) by convex sections ( 12 ) are fixed, which lie against each other so that between them complementary, substantially sharp-edged incisions are formed.